# CVE-2026-83153: Oracle Siebel CRM Deployment privilege escalation in Server Infrastructure

Source: https://junglewise.ai/threats/cve-2026-83153-oracle-siebel-crm-deployment-privilege-escalation-in-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-83153 · Severity: high · CVSS 8.8 · Published 2026-09-15

Oracle Siebel CRM is a widely-deployed customer relationship management platform used by enterprises to manage sales, service, and customer interactions. A flaw in the Server Infrastructure component allows a low-privileged network attacker to gain complete control of the entire Siebel CRM system, potentially exposing all customer data, transaction history, and business-critical information stored within it.

Technologies: [Oracle Siebel CRM Deployment](https://junglewise.ai/threats/technologies/siebel-crm-deployment). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-83153 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83153 being exploited in the wild.

**How severe is CVE-2026-83153?** High severity, with a CVSS score of 8.8, published 15 September 2026.

**Which products and versions are affected?** Oracle Siebel CRM Deployment 17.0-26.7.

**Is there a fix for CVE-2026-83153?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-83153 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-83153?** Check whether you run Oracle Siebel CRM Deployment at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This vulnerability in the Siebel CRM Deployment Server Infrastructure component is easily exploitable and allows a low-privileged attacker with network access via HTTPS to achieve complete system compromise. The attack requires minimal preconditions—only a low-privilege account and network reachability—and does not require user interaction. Successful exploitation results in full takeover of the Siebel CRM Deployment, granting the attacker unrestricted access to confidentiality, integrity, and availability of the system and data. The vulnerability affects versions 17.0 through 26.7; patch availability should be confirmed with Oracle.

## Affected products

- Oracle Siebel CRM Deployment 17.0-26.7

## Timeline

- 2026-09-15: disclosed

## References

- [https://www.oracle.com/security-alerts/cspusep2026.html](https://www.oracle.com/security-alerts/cspusep2026.html)

## Related threats

- [Oracle Siebel CRM unauthorized data access in Server Infrastructure](https://junglewise.ai/threats/cve-2026-91450-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthorized data access via HTTP](https://junglewise.ai/threats/cve-2026-91449-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthenticated data access](https://junglewise.ai/threats/cve-2026-91448-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM Deployment unauthorized data access](https://junglewise.ai/threats/cve-2026-91447-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)
- [Oracle Siebel CRM privilege escalation in Server Infrastructure](https://junglewise.ai/threats/cve-2026-91444-vulnerability-in-the-siebel-crm-deployment-product-of-oracle)